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1 Corona present (a fused tubular or flattened petaloid structure in the center of the flower, above the tepals). |
..2 Filaments fused with the corona; corona very membranous in texture, distinctly thinner than the tepals; flowers white; [native, of riverine or tidal shores and marshes]; [tribe Hymenocallideae, subtribe Hymenocallidinae] |
..2 Filaments not fused with the corona; corona membranous in texture, but similar to the tepals (in texture, though sometimes of a different color); flowers usually at least partly yellow or orange (sometimes purely white); [exotic, naturalized in primarily upland and disturbed habitats]; [tribe Narcisseae, subtribe Narcissinae] |
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....3 Flowers red; stamens about 2-2.5× as long as the tepals; [tribe Lycoridae] |
....3 Flowers white, yellow, copper, or white-pink; stamens shorter than or about as long as the tepals. |
......4 Flowers yellow to copper. |
........5 Tepals apiculate at the tip, especially the outer 3 tepals; scape hollow; [tribe Hippeastreae, subtribe Zephyranthinae] |
........5 Tepals rounded at the tip; scape solid; [tribe Narcisseae, subtribe Narcissinae] |
......4 Flowers white or white-pink. |
..........6 Tepals 0.4-2.5 cm long, white, with small green or yellow spots; [tribe Galantheae]. |
............ 7 Inner 3 tepals distinctly shorter and blunter than the outer 3 tepals, only the inner 3 with a green spot near the tip |
............ 7 Inner 3 tepals and outer 3 tepals of similar size and shape, all 6 white with a green spot near the tip |
..........6 Tepals 3-16 cm long, white, white-pink, or pink. |
............ ..8 Tepals spreading, separate, the perianth rotate; inflorescence a several-flowered umbel terminating the stem; leaves arranged spirally; leaf margins finely toothed; [tribe Amaryllideae, subtribe Crininae] |
............ ..8 Tepals ascending, overlapping, the perianth tubular; inflorescence either of a single flower or a several-flowered umbel terminating the stem; leaves either arranged distichously or spirally; leaf margins smooth |
............ ....9 Inflorescence a several-flowered umbel terminating the stem; leaves arranged spirally; [tribe Lycoridae] |
............ ....9 inflorescence of a single flower; leaves arranged distichously; [tribe Hippeastreae, subtribe Zephyranthinae] |
